.head {
    position: relative;
    height: 150px;
    width: 100%;
    color: white;
    background-color: rgba(234, 111, 90,0.7);
}
.head>h1 {
    position: absolute;
    top: 10px;
    left: 80px;
    font-size: 60px;
}
.head>h3 {
    position: absolute;
    bottom: 10px;
    left: calc(50% -    90px);
    font-size: 30px;
}
.body {
    width: 100%;
    height: 700px;
    /* background: #000; */
}
.body-left {
    float: left;
    width: 300px;
    height: 700px;
    overflow: auto;
    /* padding-left: 20px; */
    /* padding-top: 50px; */
    background-color:rgb(255,255,255);
}
.body-left ul {
    /* padding-left: 20px; */
    background-color: rgb(247, 247, 247);
    padding-top: 50px;
}
.body-left ul li {
    height: 60px;
    line-height: 60px;
    list-style: none;
    text-indent: 2em;
}
.body-left li:hover {
    background-color: rgba(0,0,0,0.1);
    cursor: pointer;
}
.body-left ul li:nth-child(2){
    background-color: #dedede;
}
.body-right{
    width: calc(100% - 300px);
    float: right;
}